#!/bin/bash
# Author:  yeho <lj2007331 AT gmail.com>
# BLOG:  https://blog.linuxeye.com
#
# Notes: OneinStack for CentOS/RadHat 5+ Debian 6+ and Ubuntu 12+
#
# Project home page:
#       https://oneinstack.com
#       https://github.com/lj2007331/oneinstack

for Package in apache2 apache2-doc apache2-utils apache2.2-common apache2.2-bin apache2-mpm-prefork apache2-doc apache2-mpm-worker mysql-client mysql-server mysql-common libmysqlclient18 php5 php5-common php5-cgi php5-mysql php5-curl php5-gd libmysql* mysql-*
do
    apt-get -y remove --purge $Package
done
dpkg -l | grep ^rc | awk '{print $2}' | xargs dpkg -P

apt-get -y update

# check upgrade OS
[ "$upgrade_yn" == 'y' ] && apt-get -y upgrade

# Install needed packages
for Package in gcc g++ make cmake autoconf libjpeg8 libjpeg8-dev libjpeg-dev libpng12-0 libpng12-dev libpng3 libfreetype6 libfreetype6-dev libxml2 libxml2-dev zlib1g zlib1g-dev libc6 libc6-dev libglib2.0-0 libglib2.0-dev bzip2 libzip-dev libbz2-1.0 libncurses5 libncurses5-dev libaio1 libaio-dev libreadline-dev curl libcurl3 libcurl4-openssl-dev libcurl4-gnutls-dev e2fsprogs libkrb5-3 libkrb5-dev libltdl-dev libidn11 libidn11-dev openssl libssl-dev libtool libevent-dev bison re2c libsasl2-dev libxslt1-dev libicu-dev locales libcloog-ppl0 patch vim zip unzip tmux htop bc expect rsync git lsof lrzsz cron logrotate ntpdate psmisc
do
    apt-get -y install $Package
done

# PS1
[ -z "`grep ^PS1 ~/.bashrc`" ] && echo "PS1='\${debian_chroot:+(\$debian_chroot)}\\[\\e[1;32m\\]\\u@\\h\\[\\033[00m\\]:\\[\\033[01;34m\\]\\w\\[\\033[00m\\]\\$ '" >> ~/.bashrc

# history size
[ -z "`grep ^HISTSIZE ~/.bashrc`" ] && echo 'HISTSIZE=100' >> ~/.bashrc
[ -z "`grep history-timestamp ~/.bashrc`" ] && echo "export PROMPT_COMMAND='{ msg=\$(history 1 | { read x y; echo \$y; });user=\$(whoami); echo \$(date \"+%Y-%m-%d %H:%M:%S\"):\$user:\`pwd\`/:\$msg ---- \$(who am i); } >> /tmp/\`hostname\`.\`whoami\`.history-timestamp'" >> ~/.bashrc

# /etc/security/limits.conf
[ -e /etc/security/limits.d/*nproc.conf ] && rename nproc.conf nproc.conf_bk /etc/security/limits.d/*nproc.conf
[ -z "`grep 'session required pam_limits.so' /etc/pam.d/common-session`" ] && echo 'session required pam_limits.so' >> /etc/pam.d/common-session
sed -i '/^# End of file/,$d' /etc/security/limits.conf
cat >> /etc/security/limits.conf <<EOF
# End of file
* soft nproc 65535
* hard nproc 65535
* soft nofile 65535
* hard nofile 65535
root soft nproc 65535
root hard nproc 65535
root soft nofile 65535
root hard nofile 65535
EOF

# /etc/hosts
[ "$(hostname -i | awk '{print $1}')" != "127.0.0.1" ] && sed -i "s@^127.0.0.1\(.*\)@127.0.0.1   `hostname` \1@" /etc/hosts

# Set timezone
rm -rf /etc/localtime
ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

# Set DNS
#cat > /etc/resolv.conf << EOF
#nameserver 114.114.114.114
#nameserver 8.8.8.8
#EOF

# alias vi
[ -z "`grep 'alias vi=' ~/.bashrc`" ] && sed -i "s@^alias l=\(.*\)@alias l=\1\nalias vi='vim'@" ~/.bashrc
sed -i 's@^"syntax on@syntax on@' /etc/vim/vimrc
sed -i 's@^# export LS_OPTIONS@export LS_OPTIONS@' ~/.bashrc
sed -i 's@^# alias@alias@g' ~/.bashrc

# /etc/sysctl.conf
[ -z "`grep 'fs.file-max' /etc/sysctl.conf`" ] && cat >> /etc/sysctl.conf << EOF
fs.file-max=65535
fs.inotify.max_user_instances = 8192
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_max_syn_backlog = 65536
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.route.gc_timeout = 100
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_synack_retries = 1
net.core.somaxconn = 65535
net.core.netdev_max_backlog = 262144
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_max_orphans = 262144
EOF
sysctl -p

sed -i 's@^ACTIVE_CONSOLES.*@ACTIVE_CONSOLES="/dev/tty[1-2]"@' /etc/default/console-setup
sed -i 's@^# en_US.UTF-8@en_US.UTF-8@' /etc/locale.gen
init q

# Update time
ntpdate pool.ntp.org
[ ! -e "/var/spool/cron/crontabs/root" -o -z "`grep ntpdate /var/spool/cron/crontabs/root 2>/dev/null`" ] && { echo "*/20 * * * * `which ntpdate` pool.ntp.org > /dev/null 2>&1" >> /var/spool/cron/crontabs/root;chmod 600 /var/spool/cron/crontabs/root; }
service cron restart

# iptables
if [ -e '/etc/iptables.up.rules' ] && [ -n "`grep ':INPUT DROP' /etc/iptables.up.rules`" -a -n "`grep 'NEW -m tcp --dport 22 -j ACCEPT' /etc/iptables.up.rules`" -a -n "`grep 'NEW -m tcp --dport 80 -j ACCEPT' /etc/iptables.up.rules`" ];then
    IPTABLES_STATUS=yes
else
    IPTABLES_STATUS=no
fi

if [ "$IPTABLES_STATUS" == 'no' ];then
    [ -e '/etc/iptables.up.rules' ] && /bin/mv /etc/iptables.up.rules{,_bk}
    cat > /etc/iptables.up.rules << EOF
# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT DROP [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:syn-flood - [0:0]
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 443 -j ACCEPT
-A INPUT -p icmp -m limit --limit 100/sec --limit-burst 100 -j ACCEPT
-A INPUT -p icmp -m limit --limit 1/s --limit-burst 10 -j ACCEPT
-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -j syn-flood
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A syn-flood -p tcp -m limit --limit 3/sec --limit-burst 6 -j RETURN
-A syn-flood -j REJECT --reject-with icmp-port-unreachable
COMMIT
EOF
fi

FW_PORT_FLAG=`grep -ow "dport $SSH_PORT" /etc/iptables.up.rules`
[ -z "$FW_PORT_FLAG" -a "$SSH_PORT" != '22' ] && sed -i "s@dport 22 -j ACCEPT@&\n-A INPUT -p tcp -m state --state NEW -m tcp --dport $SSH_PORT -j ACCEPT@" /etc/iptables.up.rules
iptables-restore < /etc/iptables.up.rules
cat > /etc/network/if-pre-up.d/iptables << EOF
#!/bin/bash
/sbin/iptables-restore < /etc/iptables.up.rules
EOF
chmod +x /etc/network/if-pre-up.d/iptables
service ssh restart

. ~/.bashrc
